Derivatives of D-glucosamine ; Enzymatic resolution of amino acids ; Attempted resolution of 3-(α-phenyl-β-acetylethyl)-4-hydroxycoumarin
University of Wisconsin--Madison, 1950 - 200 pages
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2N sodium hydroxide acid chloride acyl acyl amino acid added alcohol amine amino acid amino acid azides Analysis anhydride anhydrous anilide anilide synthesis anilide This anilide aniline salt antipode Attempted preparation azide bath Bergmann Biol Calculated cent ethanol cent of theory Chem chloroform compound concentrated hydrochloric acid congo red cooled coumarin coupled crystalline crystallization Curtius rearrangement deacetylated dioxane dissolved Doherty dried dryness in vacuo enzyme ester ether ethyl acetate evaporated to dryness experimental section filtered flask Fruton glacial acetic acid glucopeptides glucosamine glycine heated under reflux hippuryl azide hydrochloric acid hydrogen hydrogenolysis hydrolysis hydrolyzed hydroxycoumarin isolated isomers lactone melting point methionine method methyl hemiketal moles obtained oxidation papain peptide phenylhydrazide procedure product melted protein pyridine reaction mixture reagent recrystallization removed by filtration residue resolution of amino room temperature separated sodium hydroxide sodium sulfate soluble solution solvent Stahmann syrup tetraacetyl-D-glucosamine washed yield Zervas